James keiller



(No Model.)

JQKEILLER.

GIROULATING DEVICE FOR STEAM BOILERS.

UNITED STATES PATENT OEEIcE.

' JAMES KEILLER, OF GOTHENBURG, SWVEDEN.

CIRCULATING DEVICE FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 482,879, dated July 22, 1890.

Application filed November 28, 1888. Serial N0- 292,l01. (N0 model.) Patented in Sweden March 13, 1884, N0- 287; in England December 22, 1884, No. 16,802; in Denmark October 26, 1885, No. 1,955, and in Finland November 12, 1886, No, 265.

To all whom it may concern.-

Be it known that 1, JAMES KEILL-ER, a citizen of Sweden, anda resident of Gothenburg, Kingdom of Sweden, have invented new and useful Improvements in Circulating Devices for Steam-Boilers, (for which I have obtained Letters Patent in Sweden, No. 287, dated March 13, 1884; in England, No. 16,802, dated December 22, 1884; in Denmark, No. 1,955, dated October 26, 1885, and in Finland, No. 265, dated November 12, 1886,) of which the following, taken in connection with the accompanying drawings, is a specification.

This invent-ion relates to improvements in circulating devices for steam-boilers for the purpose of promoting circulation of water therein, and consequently equalizing the terriperature of the contents of the boiler, as well as the various plates or component parts of the latter.

Differences of temperature occur in various constructions of boilers-for instance, in a tubular boiler for steamships, The water above the grate will have a higher temperature than the waterbelow the source of heat, and in Cornish boilers the water above the upper portion of the tube forming the crown of the furnace and flue being acted upon directly by the products of combustion will have a higher temperature than the water and plates in the lower portion of such boilers. These marked differences in temperature cause unequal expansion and contraction of the boiler-plates and consequent leakage at the rivets and joints, and are liable ultimately to render it impossible to keep the boiler tight.

This invention is designed to obviate these evils, and it is constructed as follows, reference being had to the accompanying drawings, wherein- Figure 1 represents a sectional elevation of the device, showing the agitator-spindle arranged at an angle to the boiler-shell. 2 represents a plan view of the stufling-box for the spindle. Fig. 3 represents a sectional elevation of a modification of the device, showin g the agitator-spindle arranged at right angles to the boilenshell, and Fig. 4 represents such modification in which the agitatorspindle is arranged at an angle to the boilershell. Fig. 5 represents a front view of the stuffing-box shown in Fig. 3, and Fig. 6 represents a similar view of the stuffing-box shown in Fig. 4.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

A is a shaft or spindle having secured to its inner end, in any suitable manner, the hub B, provided with agitator-blades O 0, preferably made propeller-shaped, as shown. To the outer end of the spindle A is secured the crank-handle D or a pulley or other suitable means for turning the said spindle A.

The spindle A is supported in and passes through a stuffing-box E, secured in a suitable manner to the boiler-shell H, preferably by means of a flange E, bolted to the outside of the boiler-shell H, as shown in Figs. 1 and 2, althoughto equal advantage said stufling-box may-be secured by means of a suitable nut E", arranged on the outside of the boiler-shell and screwed around the projecting end of the said stuffing-box E, as shown in the modification in Figs. 3, 4, 5, and 6.

A is a collar on the spindle A, that lays in contact with the bottom of the recess in the stuifingbox E, thus preventing longitudinal motion inward of said spindle A. For the purpose of preventing longitudinal motion in the opposite direction of said spindle, I provide the stuiiing-box E with an adjustable screw-threaded gland F, fitting within the internal screw-threaded recess of the said stufting-box, and between the inner end of said gland and a washer G, surrounding the spindle A in front of the collar A, is arranged the packing I, as shown in Figs. 1, 3, and 4, and it will thus be seen that the spindle A may be turned around its axis so as to impart a rotary motion to the wings or propeller C 0 without permitting a longitudinal motion to said spindle and its attachments.

I provide the stuffing-box E with a tubular extension E that projects inside of the boiler H, as shown in Figs. 1, 2, 3, and 4, and serves as a guide and bearing for the inner end of the shaft'or spindle A.

As will be seen from the above, by turning IOC the shaft or spindle A the blades or propeller C G, secured to its inner end, substantially as C C will be caused to agitate the water in the and for the purpose set forth.

boiler, and thus effectthe circulation desired. In testimony whereof I have signed my WVhat I Wish to secure by Letters Patent name to this specification, in the presence of I 5 5 and claim istwo subscribing Witnesses, on this 9th day of The improved circulating device, as de- February, A. D. 1888. scribed, consisting of the stuffing-box E, se- JAMES KEILLER cured to the boiler-shell and having the inwardly-projecting tubular extension E and -Witnesses:

[O stuffing-gland F, combined With the spindle J. W. SETTERBERG,.

A, having the collar A, and blades or wings J. O. LUNDIsE. 

